Receiving perforator



' March 5, 1940. E. E. KLEINSCHMIDT ,3

RECEIVING PERFORATOR Original F 'il ed May 7, 19:57 2 Sheets-Sheet 1llll lli mm W , IWII Patented Mar. 5, 1940 UNITED STATES 2,192,352RECEIVING PERFOBATOR Edward E. Kleinschmidt, Highland Park, 111.

Application May "I, 1937, Serial No. 141,368

' Renewed August 10, 1939 20 Claims.

This invention relates to telegraph receiving perforators and inparticular, to the type in which a group of perforations representingthe signals for telegraphing a letter is perforated cross-wise in atape.

Rerforators' now in use, as well as those proposed in the past, arecomplicated and costly in that all are provided with means to store thereceived selections which then transfer these se- 0 lections to aperforator or recording mechanism where separate mechanisms are providedto complete the perforating or recording operation.

In the present invention the devices for stor ing and transferring theselections, as well as the additional mechanism for perforating orother- -wise recording the selections, areentirely eliminated. Thissimplification greatly reduces the number of parts required and makespossible the construction of a perforator at a much smaller cost. Thecost of upkeep is also greatly reduced, and due to the direct action andto the reduced number of adjustments required, the perforator of thepresent invention will operate more reliably than those previouslyproposed.

An object of the invention is to provide a simplified mechanism in whichthe usual means for storing the selections and for operating theselected punches in a group are eliminated.

A further object is to provide a mechanism in which a set of camsoperate a set of punch levers in succession and a receiving magnetdetermines the punching operation of the punch lever so that aperforation is made in the tape for a signal impulse when it is receivedon the receiving magnet.

A further object is to provide an automatic feed-out device for theperforated tape which is started in operation when a message iscombracket 3. It is rotated by gear 4. through friction coupling 5.Pinion 6 which drives gear 4 is connected to a constant speed motor notshown. As shown in Figures 1, 2 and 3, shaft 2 has mounted thereon a setof code punch cams I, 8, 9, HI and H, a feed punch cam l2, and a feedcam l3. An adjustable stop plate I4 is mounted on 5 the cam assembly. Aset of five code punch levers numbered I5, l6, l1, l8 and I9 whichcooperate respectively with cams 1, 8, 9, l0 and H are mounted on stud20 and are normally held against the lower part of stud 20 and againststud 2| by springs 22. The bearing aperture in code punch levers l5 toI9 is elongated so that the lower portion can move away from stud 20 fora purpose to be later explained. A set of code punches numbered 23, 24,25, 26 and 21 are operated by code punch levers l5 to IS; the codepunches when operated pass through paper tape 28 and die plate 29. Eachof the code punches is provided with a spring 30 to withdraw it from dieplate 29 after the punching operation. All of the code punches 23 to 21are located in a row at right angle to paper tape 28.

Feed punch 3| is provided and has a spring 32 for retracting it from dieplate 29 after the punchin operation; feed punch 3| is operated by feedpunch lever 33 pivoted on stud 68 which cooperates with feed punch caml2. A feed wheel 34 is mounted on shaft 35 which has attached to it feedratchet 36 and is operatedby feed pawl 3'], feed pawl lever 38 alsopivoted on stud 58, and feed cam l3. A detent 39 is pressed against feedratchet 36 by spring 40 and holds feed ratchet 36 in the fed position.Feed wheel 34 is located at a point approximately midway between codepunches 23 to 21 and feed punch 3|. The feed holes are thereforeperforated in advance of the code holes. By this structure it ispossible to perforate the code holes very close to the edge of die plate29 so that the last row can be advanced out of the die immediately afterthey are perforated;

The blank paper tape 28 to be perforated is fed to the leftin Figures 1and 2 from a storage wheel not shown over roller 4| and from there underdie plate 29 and over feed wheel 34.

A receiving magnet 42 is connected in the nor-v mally energized circuitof a transmitter by wires 82 according to the usual practice. Armaturelever 43 is pivoted on stud 44 and held in the retracted position byspring 45. Armature lever 43 carries an armature 46 to cooperate withmagnet 42, a fulcrum plate 41 having an upper beveled edge and atriangular stop projection 48. In the retracted position, armature lever43 rests against stop screw 49. A start-stop lever 59, pm-

' lever'43 as shown in Figures 2 and 6 they will .from stop lug 56.

engage with fulcrum plate 41 and pivot thereon when one of the codepunch cams I to I I operates the punch lever of which it forms a part.When the bearing ledge of a punch lever engages fulcrum plate 41 topivot (Figure 6) thereon, the angular face engages the angular face offulcrum 41 and also locks armature lever 43 in position until thepunching operation is com-'- pleted. When the bearing ledge of a punchlever does not pivot on plate 4! but passes in front of it (Figure 5) aswill occur when a code punch cam I to II operates a punch lever whilearmature lever 43 is in the retracted position, armaturelever '43 willbe locked in that position by the vertical face of ledge 58 until thepunch lever returns to its rest position. The purpose of thisconstruction is to increase the operating margins of the perforatorunder adverse signalling conditions by providing in the selectingmechanism a definite point of determination for completing a selectingoperation after it has been initiated by the selecting magnet.

' Perforating operation relation with the speed of a transmitter. Underthese conditions shaft 2- and the cams mounted thereon are heldstationary by stop lug 52 engaging with stop lug 58. v

I will describe the operation of the perforator when it is receiving theletter A which consists of the following impulses: one no current startimpulse, two current impulses, three no current impulses, and the normalcurrent stop condition. Upon the reception of the no current startimpulse, armature lever 43 is released and stop projection 5| drops offstop projection 48 under the action of spring 55, disengaging stop lug52 Shaft. 2 thereupon revolves. The first pulse for the letter A willattract armature lever 43 placing fulcrum plate 41 under bearing ledge58 of code punch levers I5 to I9. As shaft 2 revolves, code punch cams Iwill engage with code punch lever I5, (Figs. 5 and 6) pressing samedownward causing its bearing ledge 58.

to engage with fulcrum plate 41. Code punch lever I5 now pivots onfulcrum plate 4! and forces code punch 23 through paper tape 28..

The second pulse for the letter A also holds armature lever 43 attracteduntil code'punch cam 8"has engaged code punch lever I6 to force codepunch 24 through the paper tape 28 in the same manner as just described.

The third pulse for the letter A being no current, releases armaturelever 43 moving fulcrum plate 4! out of. the path of bearing ledges 58(Fig. 5) so that when code punch earn 9 engages with code punch leverII, its bearing ledge 58 does not fulcrum on plate 4! and code punch 25is not operated. Code punch lever II now fulcrums on code punch 25 atthe end opposite to that engaged by code punch cam 9. The springs 22which have less tension than the springs 38 will be extended and thepunches will not be moved. The fourth and fifth impulses for the letterA are also a no current condition, armature lever 43 therefore remainsretracted and neither of the 'code punches 26 and '21 are operated. Thethen following normal stop pulsewill attract armature lever 43 and camlug 5! will engage cam face 53 and move start-stop lever 50 to replaceprojection 5| on top of stop projection 48. This action will momentarilyWithdraw armature lever 43 slightly from its attracted position. Whileshaft 2 is rotating and while code punch levers I5 to I9 are beingoperated, feed punch cam I2 engages proje'ction58 forming part of feedpunch lever 33 and operates that lever to force feed punch 3| throughthe paper tape 28. After the code punches have been operated, feed camI3 engages with projection 60 forming part of feed pawl lever- 38,operating it to move feed tions.

Automatic feed-out device It is found desirable in various types oftransmitting systems to automatically feed out the tape after themessage has been completely perforated therein. To accomplish this thefollowing devices are provided:

As shown in Figure l a universal bar 6| is pivoted on stud 20 and has aprojection 62 which engages projection 63 forming part of latch lever64. 'At every revolution of shaft 2 a cam 66 operates lever 65-to set inon latch lever 64' thereby closing the contacts III. Feed pawl lever 38has a stud 61 that engages with contact springs I8 to close themmomentarily whenever feed cam I3 operates feed pawl lever 38.

Referring to Figure 4, the. contact springs I0 and I9 are connected inseries and are placed in a circuit with stepping magnet II and battery88. Armature lever I2 which cooperates with magnet II carries a spacingpawl 13 that operates ratchet wheel 14. Detent I5 is provided toholdratchet wheel I4 in itsvarious set positions. To the ratchet isattached projection I6 which in its normal position engages with contactspring r 11 to hold the same out of contact with contact spring I8.Contacts I1 and I8 are in.a circuit bridging perforator receiving magnet42.

Automatic feed-out operation In'the arrangement set forth it iscontemplated that a blank combination, that is: a combination of.signals which perforate no holes in the paper tape 28 shall betransmitted at the end of every message. As previously mentioned,contact cam 66 operates lever 65 to latch it on latch lever 64closingeontacts III. This happens at the beginning of every operatingcycle as shown by the timing chart, Figure 7. If thereafter a blankcombination of signals is received on magnet 42, none of the code punchlevers I5 to I9 will be.

16 from contact spring 11 permittingit to con- 7 tact with spring I8 andclose a circuit around the perforator receiving magnet 42. After amessage has been received by the perforator it is expected that therewill be a short interval before the following message is started. Duringthis interval the normal stop current is on the transmission line.

When receiving magnet 42 is shunted by contact springs TI and 18 itbecomes deenergized releasing armature lever 43 and permitting shaft 2to rotate in the manner previously described.

Under this condition armature lever 43 is not attracted and fulcrumplate 41 remains out of the path of bearing ledges 58, none of the codepunch levers l5 to l9 are operated, contact operating lever 65 remainslatched on latch lever 64 and for every revolution of shaft 2 contactspring 19 will close momentarily, causing stepping magnet II to stepratchet wheel 14 one tooth for each revolution of shaft 2. Thiscontinues until projection 16 again engages with contact spring 11 tobreak its connection with contact spring 18, thereupon receiving magnet42 is again energized, armature lever 43 attracted and when cam lug 51engages with cam face 53, start-stop lever is reset and stop lug 56 willengage with stop lug 52 and remain there until another message istransmitted into the perforator.

When a combination of signals other than a blank is received on magnet42 at least one of the code punch levers l5 to la is operated anduniversal bar 6| will be operated to operate the latch lever 64 andrelease contact lever 65'permitting contact 10 to open. When thereafterthe feed pawl lever 38 operates to close contact spring 19 no circuitwill be established through the stepping magnet l l The automaticfeed-out device will therefore remain inoperative whenever a combinationof signals other than blank is received on magnet 42.

While the invention herein described is shown in connection with theoperation of a receiving perforator to operate in the circuit oftransmitter sending five unit permutation code and start-stop signals,it is to be understood that its application is not limited thereto buthas a wide field in various forms of telegraph systems using differentsignalling codes.

The invention may be embodied in other specific forms without departingfrom the spirit or essential characteristics thereof. The presentembodiments are therefore to be considered in all respects asillustrative and not restrictive, the.

scope of the invention being indicated by the appended claims ratherthan by the foregoing description, and all changes which come within themeaning and range of equivalency of the claims are therefore intended tobe embraced therein.

What is claimed and desired to be secured by United States LettersPatent is:

1. A telegraphic receiving perforator comprising a group of punches, agroup of punch levers, one for eachunit in a code, a group of cams foroperating the punch levers in succession one at a time, and a receivingmagnet for selectively controlling the operation of the punch levers onthe punches.

2. A telegraphic receiving perforator comprising a group of punches, agroup of punch lever's, one for each unit in a code, a group of cams foroperating the punch levers in succession one at a time, and magnetoperated means associated with the punch levers to cause the latter tooperate a punch, or to prevent the operation of a punch, in accordancewith the signals received on said magnet.

3. A telegraphic receiving perforator comprising a group of punches andmechanism to operate said punches to perforate a record tape in codegroups in accordance with received code signals, and means toautomatically advance the tape through the perforator a predeterminednumber of code groups when the first group of code signals ofpredetermined combination is received.

4. A telegraphic receiving perforator comprising a group of punches, agroup of operating punch levers, one for each unit in a code, a group ofcams for operating the punch levers in succession one at a time, saidlevers under normal or inactive operation pivoting on the punches andunder active operation pivoting at a point between the punches and thecams onan abutment which is movable in or out of the pivoting point ofthe punch lever to thereby selectively control the operation of thepunch levers on the punches.

5. A telegraphic receiving perforator comprising a group of codepunches, means to operate said punches to perforate a record tape, andan electro magnet to operate a selecting. mechanism to selectivelycontrol the operation of the punches on the record tape, means operatedby direct operation of the selecting mechanism to make the electromagnet inactive for a predetermined number of punching operations.

6. A telegraphic receiving perforator comprising a group of codepunches, a set of punch levers to operate said punches to perforate arecord tape, and an electro magnet to operate selecting mechanism toselectively control the operation of the punches on the record tape,means operated by the punching mechanism to short circuit the electromagnet for a predetermined number of punching operations when a group ofsignals of predetermined combination are received on the said magnet.

7. A telegraphic receiving perforator comprising a receiving magnet, anarmature cooperating with said magnet, a group of punch levers, one foreach unit in a code and arranged to cooperate with said armature, agroup of code punches, a series of cams, one for each punch lever andarranged to operate directly the levers in succession, said camsoperating in timed relation to the signals received on the magnet andthe co-operating faces of thearmature and the punch levers 50 locatedthat when a punch lever is operated by its cam in one position of thearmature, it engages the latter to pivot thereon and operate a punch,and in the other position of the armature it does not engage therewithand does not operate a punch.

8. A telegraphic receiving perforator comprising a group of punches anda group of punch levers, a set of cams rotated in timed relation withthe received signals to directly and selectively operate the punchlevers and the punches,

I one position of the armature lever and thereby operate a punch and notengage with the pivoting face in the other position of the armaturelever.

10. A telegraphic receiving perforator comprising a group of punches, agroup of punch operating levers each individual to a punch, cam means tooperate the punch operating levers in succession, and magneticallycontrolled means to control the operation of the punch levers on thepunches.

11. A telegraphic receiving perforator comprising a group of punches, agroup of punch operating levers, and cam means to operate the punchoperating levers, magnetic means to directly control the selectiveoperation of the punch operating levers on the punches, a contact deviceunder the control of the selective operation of the punches, and meansoperated by said contact device to, control the selective operation ofthe punches.

12. A telegraphic receiving perforator comprising a group of punches, agroup of punch operating levers, a set of cams rotated in timedrelationwith received signals to always operate thepunch'operatinglevers in succession, a fulcrum movable into two positions, saidpunchoperating levers when operated by the cams engaging with ,thefulcrumto operate the punches and to lock the fulcrum against movementwhen it is in one of its positions and to engage with the fulcrum tolock itagainst movement but not operate the punches when the fulcrum isin its other or second position.

13. A telegraphic receiving perforator com-' prising a group of punchesthat are operated in succession one at a time by a group of cams underthe selective control of a receiving magnet.

14. A telegraphic receiving perforator comprising a group of punchesthat are operated in succession one at a time by a group of cams underthe selective control of a; receiving magnet, said selective controlcomprising an armature for said magnet, a set of operating members thatare always operated in succession by the cams, said armature engagingwith the operating members in two positions to thereby selectivelyoperate the punches to lock the armature against movement regardless ofany change in the magnetic character of the magnet. Y

15. A telegraphic receiving periorator comprising a group of punches,operating means for said punches, signal responsive means controllingsaid operating means, and interlocking means for said operating andsignal responsive means to increase the operating margins under adversesignalling conditions.

16. A telegraphic receiving perforator comprising a group of punches,operating means individual to each of said punches, signal responsivemeans controlling said operating means, and interlocking means for saidoperating and signal responsive means to increase the'operating marginsunder adverse signalling conditions.

17. A telegraphic receiving perforator comprising a group of punches,operating means individual to each of said punches, signal responsivemeans successively controlling said operating -means, and interlockingmeans for said operating and signal responsive means to increase theoperating margins under adverse signalling conditions.

18. A telegraph receiver operated by equal length groups of two-elementpermutation code signals and comprising selecting means, recordingmeans, spacing means and means under the direct and immediate control ofa single group of code signals received by the selecting means toinitiate the operation of only the spacing means for a predeterminednumber of spaces.

19. A telegraph perforator operated by equal length groups oftwo-element'code signals and comprising selecting means, code holeperforating means, feed hole perforating and spacing means, and means tooperate the feed hole and spacing v means apredetermined number of timesincluding selective means that are operable by a predetermined group ofcode signals to initiate the operation of said feed hole andspacingmeans.

20. In a receiving perforator a group of punches, a group of cams toalways operate a group of punch operating levers one at a time and intimed relation with received signals, and

a receiving magnet to control the selective operation of the punchoperating levers on the punches. EDWARD E. KLEINSCHIVIIDT.

